Methods and systems to transfer proppant for fracking with reduced risk of production and release of silica dust at a well site

Patent metadata

Field	Value
Publication number	US-9969564-B2
Application number	US-201514943182-A
Country	US
Kind code	B2
Filing date	Nov 17, 2015
Priority date	Jul 23, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

Embodiments of methods and systems of transferring proppant for fracking to reduce risk of production and release of silica dust at a well site are provided. An embodiment of a method can include positioning a plurality of containers each having proppant for fracking contained therein onto a conveyor at a well site, downwardly discharging proppant from each respective container of the plurality of containers, funneling proppant from the one or more outlets of each of the plurality of containers through a plurality of conveyor hoppers, receiving proppant onto the conveyor belt, conveying proppant on the conveyor to a chute, and depositing the proppant into the chute for use in a blender or other location at the well site.

First claim

The invention claimed is:

1. A method of logistically transferring and handling proppant for fracking at a well site, the method comprising:
positioning a plurality of modular containers, each having proppant for fracking contained therein, onto a conveyor at the well site, the conveyor including a conveyor belt and a plurality of compartments each positioned to overlie the conveyor belt and to receive one of the plurality of containers therein;
downwardly discharging proppant by gravity feed from each respective container of the plurality of containers, each respective container further having inclined lower inner portions, one or more outlets positioned at a bottom of each respective container, and one or more flow gates positioned within a track so as to be movable within the track adjacent the respective one or more outlets of each respective container and integrally formed with each respective container, such that as proppant flows by gravity feed along the inclined lower inner portions to and through the one or more outlets risk of production and release of silica dust into the air is thereby reduced, and the respective container is substantially emptied of proppant;
funneling proppant from the one or more outlets of each of the plurality of containers to thereby direct proppant from each of the plurality of containers by gravity feed to the conveyor belt so that risk of production and release of silica dust into the air is reduced;
receiving proppant onto the conveyor belt as the proppant contacts the conveyor belt;
conveying proppant positioned on the conveyor belt toward a blender hopper, the conveyor belt having a first end portion and a second end portion, and the second end portion having a shrouded portion positioned between a last respective container on the conveyor and the blender hopper to reduce the risk of production and release of silica dust into the air as proppant contacts and is carried by the conveyor belt toward the blender hopper;
depositing the proppant from the second end portion of the conveyor belt into a chute further to direct proppant to the blender hopper; and
after proppant has been discharged from a respective container of the plurality of containers, removing the respective container from the conveyor for replacement with another respective container filled with proppant, such that the conveyor belt continuously conveys proppant at the well site from the plurality of containers to the chute.

2. A method for reducing risk of production and release of silica dust at a well site during the transport of proppant for fracking, the method comprising:
utilizing a plurality of containers having proppant for fracking contained therein, each respective container having an outlet and a top with a sealable opening, the top positioned to reduce risk of release of silica dust associated with proppant from the top of each respective container;
positioning each respective container on an inner surface of a conveyor at the well site, the conveyor having a plurality of hoppers to receive proppant from one or more containers of the plurality of containers when an actuator drives movement of a flow gate positioned to movably open the outlet of each respective container, and each of the plurality of hoppers having a controllable opening, positioned at an elevation lower than an outer surface of the conveyor, that is in fluid communication with a conveyor belt that underlies the conveyor to reduce risk of production and release of silica dust associated with proppant as the proppant flows from each respective container;
downwardly discharging the proppant from each respective container through each respective opening of each respective hopper onto the conveyor belt, the conveyor belt having a first end portion and a second end portion, the second end portion including a shroud positioned over the second end portion of the conveyor belt downstream of the last respective container on the conveyor to form a shrouded portion, the shroud substantially enclosing the shrouded portion to reduce the risk of release of silica dust associated with the proppant into the air;
depositing the proppant from the second end portion of the conveyor belt into a chute further to convey the proppant to a blender hopper;
depositing the proppant into the blender hopper by gravity feed; and
after proppant has been discharged from a respective container of the plurality of containers, removing the respective container from the conveyor for replacement with another respective container filled with proppant, such that the conveyor belt continuously conveys proppant at the well site from the plurality of containers to the chute.

3. The method of claim 2 , further comprising:
after proppant has been downwardly discharged from each respective container, removing each respective container of the plurality of containers from the conveyor at the well site with a forklift for replacement with a second respective container filled with proppant for fracking contained therein, wherein each of the plurality of containers comprises a frame, which includes one or more support members, positioned to form a structural configuration thereby to strengthen each container when proppant is stored therein, such that the conveyor belt is continuously conveying proppant to the chute.

4. The method of claim 2 , further comprising:
controlling the rate of proppant flowing from each respective container using the flow gate positioned within a track at the outlet of each respective container so as to be movable within the track to reduce risk of production and release of silica dust associated with proppant into the air as proppant flows out of the outlet; and
controlling the flow gate by hydraulics or electronics to enhance opening and closing of the flow gate along the track to reduce risk of production and release of silica dust associated with proppant into the air as proppant flows out of the outlet.

5. The method of claim 4 , further comprising:
arranging the plurality of containers in a side-by-side configuration along a length of the conveyor, the conveyor comprising the actuator connected to the flow gate when the container is positioned on the conveyor, the actuator driving movement of the flow gate along the track between an open position and a closed position to control the flow rate of proppant out of the container.

6. The method of claim 2 , further comprising:
controlling the rate of proppant downwardly flowing from each respective hopper using a hopper gate and a hopper gate actuator positioned at the controllable opening of each respective hopper, wherein the plurality of hoppers are positioned side-by-side and are substantially aligned with the plurality of containers; and
controlling the hopper gate actuator by hydraulics or electronics to enhance opening and closing of the hopper gate to reduce risk of production and release of silica dust associated with proppant into the air as proppant flows out of the controllable opening.

7. The method of claim 2 , wherein a top surface of the conveyor is substantially aligned with a plane of a respective top portion of each hopper of the plurality of hoppers.

8. The method of claim 2 , further comprising:
transporting at least one container of the plurality of containers to the well site via a truck, the truck receiving and supporting at least one container of the plurality of containers;
unloading the at least one container of the plurality of containers off of the truck at the well site via a forklift, the forklift engaging slots positioned at a bottom of the at least one container to lift the at least one container off of the truck; and
arranging the plurality of containers in a stacked configuration at the well site, t

Assignees

• Oren Tech Llc

Inventors

• Oren John
• Oren Joshua

Classifications

• B65G69/185

  by means of non-sealed systems · CPC title

• B65D2588/54

  characterised by means facilitating filling or emptying · CPC title

• B65G15/42

  having ribs, ridges, or other surface projections · CPC title

• B65G65/30

  Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass (devices for tilting and emptying containers B65G65/23; such containers having means facilitating filling or emptying B65D88/54) · CPC title

• B65D88/30

  specially adapted to facilitate transportation from one utilisation site to another (collapsible hoppers B65D88/52) · CPC title